Fix image expanding and truncation issue.

ui/assets/css/main.css

@@ -158,3 +158,4 @@ hr {
 .fl-1 {
   flex: 1;
 }
+

ui/src/components/post-listing.tsx

@@ -136,7 +136,11 @@ export class PostListing extends Component<PostListingProps, PostListingState> {
             </button>
           )}
         </div>
-        {post.url && isImage(post.url) && !post.nsfw && !post.community_nsfw && (
+        {post.url &&
+          isImage(post.url) &&
+          !post.nsfw &&
+          !post.community_nsfw &&
+          !this.state.imageExpanded && (
             <span
               title={i18n.t('expand_here')}
               class="pointer"